Finding the Fourth Proportional to 118,426.42, 163,426.49 and 64,710.20

Step by Step Solution

1. Step 1: Write the proportion equation
   118,426.42 : 163,426.49 = 64,710.20 : x
2. Step 2: Convert to fraction form
   118,426.42/163,426.49 = 64,710.20/x
3. Step 3: Cross multiply
   118,426.42x = 163,426.49 × 64,710.20
4. Step 4: Simplify right side
   118,426.42x = 10,575,361,180.88
5. Step 5: Solve for x
   x = 10,575,361,180.88/118,426.42
6. Step 6: Final answer
   x = 89,299.00